<template>
  <div class="login-container">
  <el-form ref="loginForm" :model="loginForm" :rules="loginRules" 
           class="login-form" auto-complete="on" label-position="left">

   <div class="title-container">
      <h3 class="title">后台管理系统</h3>
   </div>

  <el-form-item prop="username">
    <el-input
      ref="username"
      v-model="loginForm.username"
      placeholder="用户名"
      name="username"
      type="text"
      tabindex="1"
      auto-complete="on"
      prefix-icon="el-icon-user"
    />
  </el-form-item>

  <el-form-item prop="password">
    <el-input
    :key="passwordType"
    ref="password"
     v-model="loginForm.password"
    :type="passwordType"
     placeholder="密码"
     name="password"
    tabindex="2"
     auto-complete="on"
     @keyup.enter.native="handleLogin"   
     prefix-icon="el-icon-help"
     show-password
    />
  </el-form-item>

  <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
              @click.native.prevent="handleLogin">登 录</el-button>
  </el-form>
</div>
</template>
  
  <script>
import { Message } from 'element-ui'
import '../../mock'
import 'js-cookie'

export default {
  name: 'Login',
  data() {
  const validateUsername = (rule, value, callback) => {
  if (!value) {
    callback(new Error('请输入正确的用户名'))
  } else {
      callback()
    }
}


const validatePassword = (rule, value, callback) => {
   if (value.length < 6) {
        callback(new Error('密码不能少于6位'))
    } else {
        callback()
      }
}


return {
    loginForm: {
    username: '',
    password: ''
  },
    loginRules: {
    username: [{ required: true, trigger: 'blur', validator: validateUsername }],
    password: [{ required: true, trigger: 'blur', validator: validatePassword }]
  },
    loading: false,
    passwordType: 'password',
}
 },


 methods: {
      handleLogin() {
          this.$refs.loginForm.validate(valid => {
              if (valid) {
                this.loading = true
          const data = {
            username: this.loginForm.username.trim(), 
            password: this.loginForm.password 
           }
         this.$http.post('user/login', data).then(res => {
           const info = res.data
              if (info.code !== 20000) {
                 Message({
                   message: info.message || 'Error',
                      type: 'error',
                      duration: 5 * 1000
                })
          this.loading = false
          }else{
            const token = info.data.token
            this.$router.replace('/AboutView')
          }
      }).catch(() => {this.loading = false})
      } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style>
  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 35px 50px 10px;
    margin: 0 auto;
    overflow: hidden;
    background-color: #283443;
    border-radius: 8px;
    opacity: 0.9;
}
  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
  .login-container {
    min-height: 100%;
    width: 100%;
    background-color: #2d3a4b;
    overflow: hidden;

    background-image: url('../assets/2.jpg');
    background-size: 25%;

    display: flex;
    align-items: center;
  }
 .title-container {
    position: relative;
 }
 .title {
    font-size: 26px;
    color: #eee;
    margin: 0px auto 40px auto;
    text-align: center;
    font-weight: bold;
   }
</style>